874847021 has 4 divisors (see below), whose sum is σ = 912883872. Its totient is φ = 836810172.

The previous prime is 874847011. The next prime is 874847033. The reversal of 874847021 is 120748478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120748478 = 2 ⋅60374239.

It is a cyclic number.

It is not a de Polignac number, because 874847021 - 2¹⁴ = 874830637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 874847021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (874847011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19018391 + ... + 19018436.

It is an arithmetic number, because the mean of its divisors is an integer number (228220968).

Almost surely, 2^874847021 is an apocalyptic number.

It is an amenable number.

874847021 is a deficient number, since it is larger than the sum of its proper divisors (38036851).

874847021 is a wasteful number, since it uses less digits than its factorization.

874847021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38036850.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 874847021 is about 29577.8129854119. The cubic root of 874847021 is about 956.4098475090.

The spelling of 874847021 in words is "eight hundred seventy-four million, eight hundred forty-seven thousand, twenty-one".